Inventor · disambiguated record
Sadayuki Narusawa
Also filed as: NARUSAWA SADAYUKI
17 granted patents·2 pending applications·331 citations·filing 1984–2005
94Inventor score
Top patents by PatentIndex Score
19 records- 0185US5412628AApparatus for intermittently recording and reproducing a signal on a disc type recording mediumYAMAHA CORP·Filed 1993·Granted May 2, 1995·36 cites·9 claims
- 0285US5200750ADigital-to-analog converter with noise-free sigma-delta modulationYAMAHA CORP·Filed 1991·Granted Apr 6, 1993·57 cites·4 claims
- 0381US5863206AApparatus for reproducing video, audio, and accompanying characters and method of manufactureYAMAHA CORP·Filed 1995·Granted Jan 26, 1999·60 cites·22 claims
- 0481US4815063ADisc motor control circuit for controlling the rotation of a disc in a disc playing deviceYAMAHA CORP·Filed 1986·Granted Mar 21, 1989·33 cites·13 claims
- 0577US4707805AData processing circuit for digital audio systemNIPPON MUSICAL INSTRUMENTS MFG·Filed 1984·Granted Nov 17, 1987·20 cites·9 claims
- 0670US4792852AVertical synchronizing signal detection circuitNIPPON MUSICAL INSTRUMENTS MFG·Filed 1986·Granted Dec 20, 1988·24 cites·4 claims
- 0765US4947264ASynchronizing circuit for a video disc playback deviceYAMAHA CORP·Filed 1989·Granted Aug 7, 1990·19 cites·5 claims
- 0862US4908812ASynchronizing signal reproducing circuit in a disc playback deviceYAMAHA CORP·Filed 1986·Granted Mar 13, 1990·14 cites·13 claims
- 0961US4646303AData error detection and correction circuitNIPPON MUSICAL INSTRUMENTS MFG·Filed 1984·Granted Feb 24, 1987·15 cites·5 claims
- 1053US7990822B2Sound recording/reproducing method and apparatusYAMAHA CORP·Filed 2003·Granted Aug 2, 2011·2 cites·12 claims
- 1151US4823203ARotation speed detection circuit in a video disc playback device for detecting a state in which the rotation speed is double a normal speedNIPPON MUSICAL INSTRUMENTS MFG·Filed 1986·Granted Apr 18, 1989·8 cites·4 claims
- 1250US7224811B1Audio system utilizing personal computerYAMAHA CORP·Filed 1998·Granted May 29, 2007·31 cites·18 claims
- 1350US7092331B2Reproduction of audio data from recording mediumYAMAHA CORP·Filed 2002·Granted Aug 15, 2006·1 cites·4 claims
- 1444US7769476B2Data reproducing system and data streaming systemYAMAHA CORP·Filed 2004·Granted Aug 3, 2010·0 cites·13 claims
- 1544US2006149973A1Digital information copying management apparatusYAMAHA CORP·Filed 2005·Application pending·0 cites
- 1639US6118344AFrequency control apparatus and method and storage medium storing a program for carrying out the methodYAMAHA CORP·Filed 1998·Granted Sep 12, 2000·8 cites·17 claims
- 1738US2005196131A1Audio/video system and portable terminal thereforYAMAHA CORP·Filed 2004·Application pending·0 cites
- 1833US4907072AMosaic picture generation circuitYAMAHA CORP·Filed 1988·Granted Mar 6, 1990·3 cites·3 claims
- 1929US5031052AColor phase correction circuitYAMAHA CORP·Filed 1988·Granted Jul 9, 1991·0 cites·2 claims
Join the waitlist — get patent alerts
Get an alert when Sadayuki Narusawa files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →